What is 3750 in scientific notation ?
a- 3.75 x 10^3
b-3.75 x 10^4
c- 3.75 x 10^1

A 3.75 x 10^2

Step-by-step explanation:

When we use scientific notation, we have a value multiplied by 10 raised to a power

The value has to be between 1 and 10.

So 3.75 x 10^3, if we move the decimal over 3 places to the right, we get 3750

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation: